Bogor regency has high susceptibility to landslides disaster. Geotextile reinforcement is an attempt that is appropriate to deal with slope instability. However, the significant slip parameters that guide the reinforcement design are still complicated to study. This research aims to analyze landslide slip surfaces in various circumstances. Landslide analysis was conducted in Limit Equilibrium with GeoStudio. The tensile strength geotextile was of various types: woven (7.1kN/m, 8.4kN/m, and 10kN/m) and nonwoven (32kN/m 44kN/m, and 54kN/m). Moreover, the vertical distances among geotextiles were varied in 0.25m, 0.5m, 0.75m, 1m, 1.25m, and 1.5m. The slip surface position analysis was divided into three models with different landslide beginning and ending coordinates. The result shows that Model 3 has the most significant SF of all the models, while Model 2 has the lowest. The lower the vertical distance of geotextile, the higher SF will be. The slip surface position data indicated that Model 3 is narrower than Models 1 and 2, with having an extensive slip surface position. This result is intended to assist the engineer in calculating the landslide’s starting and finishing locations (slip surface) to determine the appropriate geotextile reinforcement and the optimum safety factor.

Topics
Hydrology, Materials properties, Engineers
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